linux-kernel - [PATCH v10 05/25] ima: Align ima_post_read_file() definition with LSM infrastructure

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Date: Thu, 15 Feb 2024 11:30:53 +0100
From: Roberto Sassu <roberto.sassu@...weicloud.com>
To: viro@...iv.linux.org.uk,
	brauner@...nel.org,
	jack@...e.cz,
	chuck.lever@...cle.com,
	jlayton@...nel.org,
	neilb@...e.de,
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	Dai.Ngo@...cle.com,
	tom@...pey.com,
	paul@...l-moore.com,
	jmorris@...ei.org,
	serge@...lyn.com,
	zohar@...ux.ibm.com,
	dmitry.kasatkin@...il.com,
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	stephen.smalley.work@...il.com,
	omosnace@...hat.com,
	casey@...aufler-ca.com,
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	mic@...ikod.net
Cc: linux-kernel@...r.kernel.org,
	linux-fsdevel@...r.kernel.org,
	linux-nfs@...r.kernel.org,
	linux-security-module@...r.kernel.org,
	linux-integrity@...r.kernel.org,
	keyrings@...r.kernel.org,
	selinux@...r.kernel.org,
	linux-kselftest@...r.kernel.org,
	Roberto Sassu <roberto.sassu@...wei.com>,
	Stefan Berger <stefanb@...ux.ibm.com>
Subject: [PATCH v10 05/25] ima: Align ima_post_read_file() definition with LSM infrastructure

From: Roberto Sassu <roberto.sassu@...wei.com>

Change ima_post_read_file() definition, by making "void *buf" a
"char *buf", so that it can be registered as implementation of the
post_read_file hook.

Signed-off-by: Roberto Sassu <roberto.sassu@...wei.com>
Reviewed-by: Stefan Berger <stefanb@...ux.ibm.com>
Reviewed-by: Mimi Zohar <zohar@...ux.ibm.com>
Reviewed-by: Casey Schaufler <casey@...aufler-ca.com>
Reviewed-by: Paul Moore <paul@...l-moore.com>
Acked-by: Mimi Zohar <zohar@...ux.ibm.com>
---
 include/linux/ima.h               | 4 ++--
 security/integrity/ima/ima_main.c | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/include/linux/ima.h b/include/linux/ima.h
index 678a03fddd7e..31ef6c3c3207 100644
--- a/include/linux/ima.h
+++ b/include/linux/ima.h
@@ -30,7 +30,7 @@ extern int ima_post_load_data(char *buf, loff_t size,
 			      enum kernel_load_data_id id, char *description);
 extern int ima_read_file(struct file *file, enum kernel_read_file_id id,
 			 bool contents);
-extern int ima_post_read_file(struct file *file, void *buf, loff_t size,
+extern int ima_post_read_file(struct file *file, char *buf, loff_t size,
 			      enum kernel_read_file_id id);
 extern void ima_post_path_mknod(struct mnt_idmap *idmap,
 				struct dentry *dentry);
@@ -108,7 +108,7 @@ static inline int ima_read_file(struct file *file, enum kernel_read_file_id id,
 	return 0;
 }
 
-static inline int ima_post_read_file(struct file *file, void *buf, loff_t size,
+static inline int ima_post_read_file(struct file *file, char *buf, loff_t size,
 				     enum kernel_read_file_id id)
 {
 	return 0;
diff --git a/security/integrity/ima/ima_main.c b/security/integrity/ima/ima_main.c
index b3f5e8401056..02021ee467d3 100644
--- a/security/integrity/ima/ima_main.c
+++ b/security/integrity/ima/ima_main.c
@@ -803,7 +803,7 @@ const int read_idmap[READING_MAX_ID] = {
  * On success return 0.  On integrity appraisal error, assuming the file
  * is in policy and IMA-appraisal is in enforcing mode, return -EACCES.
  */
-int ima_post_read_file(struct file *file, void *buf, loff_t size,
+int ima_post_read_file(struct file *file, char *buf, loff_t size,
 		       enum kernel_read_file_id read_id)
 {
 	enum ima_hooks func;
-- 
2.34.1